At all over week 7 in utero, the intercourse-associated gene on the Y chromosome initiates the development on the testicles in male infants. The testicles produce testosterone.
Slowed growth in height, but their arms and legs may perhaps continue on to increase outside of proportion with the rest of their system.
Testosterone triggers the development with the male interior and exterior reproductive organs throughout fetal growth.
Your hypothalamus and pituitary gland Command the level of testosterone your gonads (testicles or ovaries) deliver and launch.
If you're thinking that you might have signs or symptoms of minimal testosterone or extra testosterone, speak with your healthcare service provider. They're able to get some assessments or mail you to definitely a specialist.
Androgen receptors happen in many various vertebrate human body technique tissues, and equally males and females react similarly to similar levels. Tremendously differing quantities of testosterone prenatally, at puberty, and through daily life account for any share of biological dissimilarities involving males and females.
Grownup testosterone outcomes tend to be more Evidently demonstrable in males than in females, but are most likely vital that you the two sexes. A few of these results might decline as testosterone levels could possibly lower inside the later decades of Grownup everyday living.[36]
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過度超量或是長期的使用睪酮，會導致睪丸及男性生殖器萎縮，且導致永久性的陽痿。如果為女性，則會出現乳房萎縮、刺激毛髮過度生長、陰蒂肥大貌似小陰莖和长胡子等種種男性化現象。
雄甾酮：雄激素分解过程中的副产物，也可以源于黄体酮。其在男性与女性的血浆和尿液中浓度大致相等，有轻微的雄性化作用，但效果仅为睾酮的七分之一。
睪酮芳構化成雌二醇會對腦及骨這兩個人體重要的組織構成主要的影響。在骨中，雌二醇加速了軟骨成長為骨的過程，使骨端接合及完成生長的程序。在中樞神經中，雌二醇是給予下視丘的主要迴饋訊號，尤其在影響排卵素的分泌。在很多哺乳動物的腦部中，某些性別差異區域在出生前或產期的雄性化，都是受著睪酮所產生的雌二醇影響，決定將來的雄性性行為。
除自然作用之外，雄性激素亦可作为药物使用，如雄激素替代疗法和促进肌肉生长。值得注意的是，成年男性無論施打多少劑量的雄激素都无助生殖器再次發育成長，反而容易增长生殖疾病风险。
[70] This reaction engages penile reflexes (such as erection and ejaculation) that support in sperm competition when multiple male is current in Seen on Youtube mating encounters, permitting For additional manufacture of effective sperm and a higher potential for copy.
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